压力容器Issue(3)：15-19,5.DOI:10.3969/j.issn.1001-4837.2015.03.002
微试样法测量25 Cr2NiMo1 V钢断裂韧度试验研究
Miniature Specimens for Fracture Toughness of A 25 Cr2NiMo1 V Steel
摘要
Abstract
Room temperature fracture toughness tests using miniature three-point bending specimens were conducted for a 25Cr2NiMo1V steel to analyze the specimen size dependence of the fracture toughness. Results show that the fracture toughness of miniaturized specimens is lower with higher degree of scatter-ing.It is indicated that the dominated plane stress state of miniature specimens reduces constraint effects from specimen thickness and ligament on deformation near crack-tip,thereby lower ability to stable crack growth.The results in our experiments are a good attempt for fracture toughness testing based on notched micro-three-point bending specimen.关键词
断裂韧度/微三点弯曲试样/尺寸效应/25Cr2NiMo1V钢/可转移性Key words
fracture toughness/miniature three-point bending specimen/size effect/25Cr2NiMo1V steel/transferability分类
机械制造引用本文复制引用
吴为,朱明亮,轩福贞..微试样法测量25 Cr2NiMo1 V钢断裂韧度试验研究[J].压力容器,2015,(3):15-19,5.基金项目
国家自然科学基金（51205131）；上海市晨光计划项目 （）
